Current AST time
· week 43 · day 294/365
Atlantic Standard Time
AST means Atlantic Standard Time. It is fixed at UTC-4 and does not change for daylight saving time.
- Zone
- AST
- UTC offset
- UTC-4
- DST
- No
- Next change
- None
- Countries
- 5
- Representative IANA zones
- 2
- 09:00 in UTC
- 13:00
These IANA zones keep UTC-4 under the current tzdb rules; historical offsets may differ.
America/Puerto_RicoAmerica/Santo_Domingo
Time difference with your location
Atlantic Standard Time is 4 hours behind UTC. Compare with your local time →
Where this time is used
Cities in 5 countries keep UTC-4 throughout 2026. Sharing an offset does not necessarily mean using the same abbreviation.
| Country | States / provinces | Cities |
|---|---|---|
| Dominican Republic | — | 45 |
| Puerto Rico | — | 21 |
| Venezuela | — | 3 |
Countries and cities in this time zone · AST
12 representative cities below currently show UTC-4.
| Location | Local time | UTC offset |
|---|---|---|
| Santo DomingoDominican Republic | UTC-4 | |
| San JuanPuerto Rico | UTC-4 | |
| CaracasVenezuela | UTC-4 | |
| La PazBolivia | UTC-4 | |
| ManausBrazil | UTC-4 | |
| Santiago de los CaballerosDominican Republic | UTC-4 |
| Location | Local time | UTC offset |
|---|---|---|
| Santo Domingo OesteDominican Republic | UTC-4 | |
| Santo Domingo EsteDominican Republic | UTC-4 | |
| San Pedro de MacorísDominican Republic | UTC-4 | |
| La RomanaDominican Republic | UTC-4 | |
| San CristobalDominican Republic | UTC-4 | |
| Puerto PlataDominican Republic | UTC-4 |
Other zones with the same UTC offset
5 other time zones share UTC-4 with AST right now. Regional zones may leave this offset when their clocks change.
Quick conversions · AST
AST = UTC-4, so 09:00 AST = 13:00 UTC (on the corresponding UTC day). These 40 zones show the equivalent of 09:00 AST using today's offsets.
| Time zone | UTC · difference | 09:00 AST = |
|---|---|---|
| AST to UTCCoordinated Universal Time | UTC+0+4h | 13:00 |
| AST to ESTEastern Standard Time | UTC-5−1h | 08:00 |
| AST to ISTIndia Standard Time | UTC+5:30+9h30m | 18:30 |
| AST to PSTPacific Standard Time | UTC-8−4h | 05:00 |
| AST to GMTGreenwich Mean Time | UTC+0+4h | 13:00 |
| AST to CSTCentral Standard Time | UTC-6−2h | 07:00 |
| AST to MSTMountain Standard Time | UTC-7−3h | 06:00 |
| AST to CETCentral European Time | UTC+1+5h | 14:00 |
| AST to AESTAustralian Eastern Standard Time | UTC+10+14h | 23:00 |
| AST to ICTIndochina Time | UTC+7+11h | 20:00 |
| AST to JSTJapan Standard Time | UTC+9+13h | 22:00 |
| AST to KSTKorea Standard Time | UTC+9+13h | 22:00 |
| AST to SGTSingapore Time | UTC+8+12h | 21:00 |
| AST to HKTHong Kong Time | UTC+8+12h | 21:00 |
| AST to BSTBritish Summer Time | UTC+1+5h | 14:00 |
| AST to EDTEastern Daylight Time | UTC-4same time | 09:00 |
| AST to PDTPacific Daylight Time | UTC-7−3h | 06:00 |
| AST to CDTCentral Daylight Time | UTC-5−1h | 08:00 |
| AST to ACDTAustralian Central Daylight Time | UTC+10:30+14h30m | 23:30 |
| AST to ACSTAustralian Central Standard Time | UTC+9:30+13h30m | 22:30 |
| Time zone | UTC · difference | 09:00 AST = |
|---|---|---|
| AST to ADTAtlantic Daylight Time | UTC-3+1h | 10:00 |
| AST to AEDTAustralian Eastern Daylight Time | UTC+11+15h | 00:00 |
| AST to AFSTAfghanistan Time | UTC+4:30+8h30m | 17:30 |
| AST to AKDTAlaska Daylight Time | UTC-8−4h | 05:00 |
| AST to AKSTAlaska Standard Time | UTC-9−5h | 04:00 |
| AST to ALMTAlmaty Time | UTC+5+9h | 18:00 |
| AST to AOEAnywhere on Earth | UTC-12−8h | 01:00 |
| AST to AST-ARABIAArabia Standard Time | UTC+3+7h | 16:00 |
| AST to ARTArgentina Time | UTC-3+1h | 10:00 |
| AST to AWSTAustralian Western Standard Time | UTC+8+12h | 21:00 |
| AST to BDTBangladesh Time | UTC+6+10h | 19:00 |
| AST to BRTBrasília Time | UTC-3+1h | 10:00 |
| AST to CATCentral Africa Time | UTC+2+6h | 15:00 |
| AST to CTCentral Time | UTC-5−1h | 08:00 |
| AST to CESTCentral European Summer Time | UTC+2+6h | 15:00 |
| AST to CHADTChatham Daylight Time | UTC+13:45+17h45m | 02:45 |
| AST to CHASTChatham Standard Time | UTC+12:45+16h45m | 01:45 |
| AST to CST-CHINAChina Standard Time | UTC+8+12h | 21:00 |
| AST to CHSTChamorro Standard Time | UTC+10+14h | 23:00 |
| AST to CLTChile Time | UTC-4same time | 09:00 |
Frequently asked questions
What is AST?
AST means Atlantic Standard Time. It is fixed at UTC-4 and does not change for daylight saving time.
Where is AST's UTC offset used?
UTC-4 is used all year in Dominican Republic, Puerto Rico, Venezuela, Bolivia, and Brazil. 5 countries in our data have cities at this offset; local abbreviations can differ.
AST vs UTC: what is the difference?
AST = UTC-4, so 09:00 AST = 13:00 UTC (on the corresponding UTC day).
Does AST have daylight saving time?
No. AST always means UTC-4. A region may switch to a different abbreviation, but this fixed label does not change its offset.